can be so... As far as i have observed for all NR's newly LHBfied trains, Pune duranto, Mao Raj, BSP Raj are now running with mixed coaches and most of them not so good.
While TVC Raj, MAS Raj with mostly new n good coaches. Only 2-3 coaches are old.
And Lucknow AC Express*(former lucknow rajdhani) , got the new shinny LHB Rake and it continues to run with clean and new LHB coaches unlike other newly LHBfied trains of NR.
Ps.:other...
more... NR's trains are DBRT Raj, RNC Raj, Jammu Raj, SC Raj.
When I travelled in TVC raj, my coache A5 was 2010 made, very dirty and not so maintained coach, pests were there too. But other coaches were fine.